Snap-switch.



I. LARSEN. SNAP SWITCH.

APPLICATION FILED OCT. 2, 1907.

Patented May 30, 1913 INVENTDR WIT N :55 E5 COMPANY, .Et CGRPOEATTQN 0. 3 N331 SNAEZSYJ Application filed llGtOlJEl 2, 1992?. Serial No.

Io all whom it may concern:

Be it known that 1, INGVALD Lassen, a subject of the King Norway, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Snap-Switches, of which the following is a specification.

This invention relates to rotary electric switches of the type in which the rotation of the spindle puts a tension on a helical spring attached to the switch-plate, and also reciprocates a catch-plate to disengage it from a fixed stop when the proper tension ot' the spring has been reached.

Heretoforevarious modes of comn1unicating the motion of the spindle to-the catchplate have been devised, but my invention aims to avoid the troubles which have occurred in some or all of these contrivances. as To this end, instead of a pinion and rack, or

a pin and slot, or such like device, I employ a crank disk and connecting-rod, the former fixedon the spindle and the latter pivotally attached to said disk and to the catclnplate. In the accompanying drawing, Figure 1 is a topplan view of a snap switch embodying my invention, the handle and cover being removed; Fig. 2 is a diametrical cross section with the handle and cover in place;

30.Figs. 3, 4: and 5 are sectional plan views showing the operation of the snap-action parts;'Fig. 6 is a perspective view of the catch-plate; and Fig.7 is a perspective view of the connecting-rod.

- The switch is provided with a base 1 of insulating material, to which are secured the binding-posts 2 carrying the stationary yielding contacts 8, concentric with a spindle 4 which is rotatably mounted in said base. eoThe' switch-plate 5, which carries the movable eontacts 6, is provided with a long hub 7 which is loosely mounted on the spindle,

a One. end of a helical spring 8, concentric with the spindle, is attached to a collar 9 on said spindle and the other end is inserted in a hole in said switch-plat The switchplate 5 is provided with depending side flanges 10 which form guides between which the catch-plate 11 is held and guided. The so catch-plate has a lug 12 arranged to engage in succession with a series of teeth or stops 13 on a stop-plate. These teeth arrest the rotation of the parts after the switch-plate has made a predetermined angular move- 5 ment. In the' ;s witch' illustrated there are Specification or? lett rs Patent.

flanges, a spring connectin said spindle a four teeth or stops ninezy degrees a that eaci movement of the switch plate is quarter revolution' The stop-plate tionary, the teeth being preferably for integral square baselei which is into a shallow recess in the base 1, the being in a circle ccncc? in the spindle.

A the center of the stop is a circular in whic cular disk secured t." catch-plate lies just above provided with a longitudina o l; 3' O which the spindle passes. slot hasa keyhole-shaped extension one end, the en larged portion 17 thereof bein circular.

A connectin rod 18 has at onc'end a circuiar 13 to the enlargement at the slot, and t us free to swing lat the plane or the catclrplate to a limited tent. The other end of the connectin -r has wrist pin 20 adapted to enter a sin holein the disk 15, so that when the spindle is rotated the catch-p will he reciprocated in obvious niannr: the slot 18 ing wide enough to permit he rod to vibrate without inndran e.

The operation of the switc? to that of other switches 0:5 his t3 the parts to stand as shown in A quarter rotation of the spindle hring into the position shown in 4&- lug 12just ready to slip oi? the the spring under torsional strain. the lug slips on, the spring rotates the switeh plate and catch-plate a quarter revolution to the position shown in Fig. 5, the co ing-iod forcing the catch-platehac. its guides so that the lug 2 will s next stop 18, and arrest the parts in sltion, I

llhat claim as new and'desire see by Letters Patent oi the United tdtate.

1.111 a snap-switch, the combinatio a rotatable spindle, ot' a switchists mounted thereon and pmvided with part plate, a catch-plate capable of reciprocation between the flanges of said switch plate and having a lug, a stationary stop-plate havi U teeth, a disk on said spindle, and a connecting-rod pivotally attached to said catcinnlate and to'said disk near its of rot 2. in a snap-switch, a spindle having a dish pic of a catclvplate ccntai slot having a circular enlargement at one end, and a connecting-rod having a circular head to fit said enlarged slot and a Wrist pin to engage With the hole in said disk. i

3'. In a snap-switch, the combination With a spindle having a disk provided With. a hole, of a catch-plate containing-a, longitudinal slot having a circular enlargement at one end, and a c0nnecting-r0d having a circular head to fit said enlarged slot and a my hand this 30th day ofSeptember, 1907.

INGVALD LARSEN. Witnesses:

BENJAMIN B. HULL, HELEN ORFORD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

